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A. &v I. M. GRAVATH.

REVOLVING PLOW.

N0. 66,80Z. Patented'July 16, 1867..

time g -wt @ffim ILLINOIS; Letters Pam No. 66 292, dated Jztlg 16, 1861.; l

IMPRovnMENT'm nnvotvnv'e Photon.

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. 0-- p Be it- -lznown that we, MYRT' I L IQUS A. CRAYATH and ISAAC M. CRAVA'Tm-of thecity of Bloomi-ngton, in the county of McLean, State of Illinois, have invented a'new and'ueetulimplement; to he nhuied and known-as the Revolving Plough; and we do-herebydeolere that the following is a full, clear, and exact-description of the construction and -operhtio'noi the same, reference Being had to the annexed di'evvings, melting a part of this? epecificntion in-whioh g Figure 1 iso perspective view of the implement'from the rear and furrowside. v

Figure 2 is'a side elevation of the same, taken on the land-side ofthe implemenges in the act of-plonghing.

AA A arethe plonghs; a a a ere the axles; B is .the -frame of the implement;.efg h are the arihs; C is the seat} D is thejvhiflletree; E E are the wheels; F F are'the slides; 'G G arethe bent levers; H are the swivels; I I are thecur'ved straps; J is the concave fla nge on'a lle a. The ploughs-A AA are constructed each of a single plate of steel, circular in form and eoncave in shape,' with the edge sharperied with the bevel on the outer or convex side, and provided with an axle, a, through 'it s centreupon whichto revolve. Said axle has n jo urnnl at each end, and a concaveflnnge, J; near one end adjoining the journal. said flange is secured to the outer or convex side-of'theplonghs A A A by means of bolts. The'ploughs AA A are secured to the frame B by the journals being passed, through, the holes in the end of the arms e f g mns shown an. The frame B, to which the ploughs A A A are'nttached, is'constructedwith a tongue of commonshzipe, having arms 'efg h attached; of difi'erent'shapes and lengths, according to the nnmherof. ploughsdesigned to he used. The seat C is placed forvrerd-ot' the ploughs'A A A on frame :13, the weight of'the driverbeingused to enforce the ec'tionof said ,pldughs. The whiflie-treeD is", forward ofthe 'seeiifl'} on'frainfi'B. The .Wheels E E hriihf: the common caster-pattern, nn'd meanness: tofhe whiiHe-tree by'mezins of the slides F, and are operated by means of the hentlevers G-G3'S1tld levers being attached to thewhe el s E E bymeans of 'the swivels H H, and being. also attahhed to the-slides F F by means of the curved straps I I; The ploughs A A A can be used singly or any desired number can: bound together; they can ,be more'or less concave, according to the size ,of theplonghs, and thewidth and depth of the furrow desired-to he ploughed. A plough three feet in diameter, coneaved to a; six-foot circle, will cut ahd'thoroughly plulverize a furrow-slice nine inches in; width and four-teen inches in depth. The arm e on frame 13, for thsiz'e of the plough herein mentioned,-muy be two and a. half feet in. length; size two inches by four at theeitreme end, and fixed at entangle of about twenty degrees from the centre line of the tong;*the' axle of the plough being setat right angles-with arm e. 'The arni f is curved so as to bring it to the same angle with arm e, at the place where it receives the axle a; the-'armf beinglong enough toadmit of placing the second. plough about-nine inches in rear of-the first, n. ndholding one journal of each axle of the firstand second ploughsj the same operation-to he'gepeated as often asano ther. plough is added. The'operation is' as follows: The levers G G are lowered, snflici'ent weight placediipon the seat C to cause the plonghs-A A A to enter the earth to the required depth. As itadvances'thfo resistance of the earth causes the said-'plonghs to revolve; The'furrow-slice is cut'on a-curved line the ploughs A A A, revolving at an .nngle of about twenty degrees from the'line of draught; move the furroiv slice "to the right, the revolving or cen trifugal motion of the some lifting. and thoroughly pulverizing the soil. The weight of the furrow-slice on the reer'o'f the concave, and the pressure on the front of the convexnt entering, the'ezirth, compensate for the ploiighs revolving nt'en angle to the line of draught. In turning the implement the level-e l} (1i are lifted and carried overu'ntil the curved straps I I rest against the'swivels H H. I

'Weclaim+ v I A I 1. The ploughA; combined with the axle a, constructed as herein mentioned, as a new article of manufacture.

2. The arms e f g It, of different lengths and shapes, as shown, for the purpose of combining and operating two or more plonghs. l v l, H

, 3. The combination of the slides F F, the bent levers G G, the swivels H H; the cizrved straps II, or'any equivalent device to operate the wheels EE in the manner set'forth, for the purpose herein mentioned. I i -In testimony of which invention-we hereunto set our hands. H l a MYRTILLUSA. CRAVATH;

ISAAC M. ORAVATHJ Witnesses Jomv 'T, Wnxros, Geo. T. Hemmer. 

